Jest available copy



Nnv. 20, 1923. 1,474,990

w` WRIGHT COMBINED TYPEWRITING AND COMPUTING MACHINE Filed Sept. 30, 1911. 5 Sheets-Sheet 1 Nov. 20, 1923. 1,474,990

w. WRIGHT COMBINED TYPEWRITING AND COMPUTINGIAOBHIE Fed Sent. 30. 1911 5 Sheets-Sheet 2 Nov. 20 1923.

w. WRIGHT COMBINED TYFEWRITING AND COMPUTING MACHINE L 5 n u Il Il l -Admi W. WRIGHT COMBINED TYPEWRITING AND coMPUTING HACHINE l911 5 Sheets-Sheet 4 Filed Sent 30 Nov. 20, 1923;

Nov. 20, 1923.

Patented Nov. 20, 1923.

Y UNITED STATES PATENT' OFFICE;

WALTER WRIGHT; or NEW YORK, N. Y., AssiGNoR 'To UNDnWooD COMPUTING MA- CHINE COMPANY, orNEw YORK, N.

Y., A CORPORATION OF NEW YORK.

COMBIND TY'PEWRITING AND COMPUTING MACHINE Application lhed September 30, 1911. Serial No. 652,153.

T o all 'whom it may concern.'

Be itknown that I, WALTER WmCHT, a citizen ofthe United States,residing inv New York city, in the county of New York and State of New York, have invented/.certain new and useful Improvements-inCombined f IIn priorapplications: as foi`- example A l application of -Wrightwand Degener No. 543,603; filed February-12, 1910,1(now Patent --No. :1,23T,008, Vdated August` 14," 1917.).,pr'ovision has been made for theachainging.'from 4 adding! -andnfneutral to': '-subtlacting Eby4 a manual.-v manipulation fof; certain: control levers.: This -manual `shifting: :isn very gbod wheref the changes :are fniniequenhi butV insome classes of lwor!i-:Wllei'e th'er'eare-several4 changs,feven;inra-vsigleiilir, tlefananual shifting becomes'. laborious and iisespecially sofmheregmore than 'ione 'eomp'utingi-.headris-,g

used. f f-Besides; 4there is ,thever prsent-. posi the 4frequent changes-,d n.; .-.pg a.. .'It fisftherefore 'an object offthis subtracting. r s In the'embodiment used toillustrate this invention, a' plurality l of -computing heads areshownof a type -in which=a .master wheel eac responds to' theaparticular. :numeral key.

riage, so as to'be bron ht successively in co-fl control, which engage mechanlsm adapted to disconnect the numeral keys from the com-'- operation with each o Va series of gears con; 'trolling corresponding vcomputing l'wheelsi The' change fromadding to subtracting, and through the intermediate neutral state, may. beobtainedby rever-sin the direction of rotationcfthe Ymaster W eel by means of Ya 'shiftable clutch adapted .to operatively coninvention vto automatically; control .thee changesof thercomptting-i-.meehanism;..- embodying once ors: more computingfheads, from-:metto the otherf of the several states of adding, neutraliand given4 a certain rotation atthestriking..of,` `numeral key, the 'extent ot'ffwhicln corri;-

nect the mainv drive in driving relation with said master Wheel through two different sets tof gearing which tend to rotate-the master wheel in opposite directions.

In this invention, theshifting of. the above-mentioned clutches for controlling the direction of rotation and the rotation ofthe master wheel may be accomplished automatically by the provision of a cam carried by the carriage embodying a plurality of cam tracks, one for each of the computing heads, which has the diierent sections of the 4track arranged so as to. shift the clutches back and forth through'the intermediary ot.V

linkages.

Another object of this invention is to permit the changetfrom automatic to manual control, and vice versa andactuate theparts sothat theelements of the one will'not interto. say, if.- it is Adesired to run-the machine withoutA the automatic control, thisautomatic fere with-the elements of the other when one is active and the other isldormant. That is control can be disconnected, and: likewisef it is desired to` run the. machine under. auto matic control; the automatic: control :can i be fbrought into operations. siblity; of- -anerrori bein made wherela 11u-1I man elementis depende fupontoaccomplsh;

To attainffthls ohject,there prdtracks4 Withithef shitable clutches, soas to automatic'contro .fw-This action renders inoperative at the same time, the' locks provided for each of the manual shift leversyso i that they will not interfere with the opera-A tion of the automaticfdevice.

A further object ofv this invention is to n automatically disconnect the computing mechanism so as to render the same inopera'- tive when it is desired to use the typewriting This master Wheel-'1mayx be :fed stepbyfstep mechanism without the computing mechanism. This may be accomplished by the pro-r;

vision of one or more cam lugs'on the cam puting control mechanism, so that when a numeralv key is struck after the disconnecting mechanism has operated1 the computing :eo vided asingle lever, which shiftsoncomif tantly all of the linkages connectingfthe cam` Fig-ure- 5, showing to provide a control of a composite nature with the elements thereof interchangeable so as to produce any desired sequence of operation as tQ adding, subtractingandneutral.. This end; may be reached by dividing the, cam tracks into a plurality of sections and having themY detachable from the body of the cam and soarranged that they can be shifted from one position to another, and in fact reversed if A still further object of this invention is to permit the typewriting` and computing mechanism to run independent of automatic control. Thisaeud may be accomplishedbyproviding means for detachably connecting the, control! embodying the cam from the carriage, so that it` will remain stationary and thereby be inactive.

Other features and advantages will hereinaften appear.

Referring. tothe drawings,`

Figure 1 is. a fragmentary perspective view.

Figure 2 is a fragmentary section taken from front to rear;`

Figure 3;- is a Bragmentary end view. in side elevation, showing the@ automatic con,- trol in operation.

FigureA isla fragmentary view similar to Figure. 3, shoiwngfthe automatic control thrownout ofoperation.

Figure 5 is a -ragmenmry perspective view, showing the4 locks tor-the manual shifti levers in theirfoparatiive position. f'

nig'ureirisiatfmgmentary one of the locks 'for the shifting levers in its inoperative position..

areanview ini elevation..

Figurer 8'.; isi aufrnim'y vertical: section taken from front to rear... l

Figure 9. isla hoizoutall longitudinal section through the contnolwith thefcam seotions: removed; i

Figure; 10: is. al real view: inelevation of theicontrol, showing the sameiopeni and withr the cam sectionsremoveda i Fiig'urel 1f1 is a fragmentary." perspective view,- shovaingi ai detail Voi the. means for.i controlling-titel rotation 01E the master wheel from the numeral key.

Figure 12 is ai detail perspective viewJ with@ the parts: detached froml eachV other, showingthe connectiony of one et theV links with. the shifter therefor.' f

Figure-13 is a'detailview of one of the tens-carryi1(11g wheels for one of the computing hea. .i

Re erring more particularly to` the sepa rate partsAof thisinvention as embodied inthe form shown inl the drawings, and as illustrated? in connection with an Underwoodfcombined! computing andi' typewritincr machine, 1` and 2 indicate respectively the character andnumeral keys which actua/ce throughithe intermediary of bell 'crank levers vlevw simllar to 3 type bars 4, so that the latter will strike rearwardly against the front side of a platen 5 mounted on a carriage 6 in the usual manner. The carriage 6 is mounted so as to travel as. usual on tracks 7! and: '8l' The motion of the carriage is attained in one direction by a sprinor barrel 9 controlled by, aA pinion 10 withV w 'clrmeslies a rackV 1f supported by pivotally mounted arms 12 on the carriage, 6. The escapement mecha nism for the pinion 10, which is actuated at the striking, of: each key to permit the step-by-step movement of the carriage 6, is not shown.

In addition to the step-by-step. movement, the carriage may be given a jump movement for the purpose of tabulating by striking one oi a series of tabulating keys 13. These .keys raise barsI 14, which are adapted to engage with stops 15 on a rackbar 16, the latter being connected to the carriage so as to move therewith. Each` of the bars 14 may be provided with an extension 17 which engages, a universal bar 182 on a lever 19. The latter is connected to a lever 20-through the intermediary of a linie 21. On the oppo-V site end of the lever 20. there is provided; a roller 225 which underlies the rack 11, and is adapted to lift the same from engagement with pinion 10 when. one of. the tabulatingY .ke s 13: is struck.

or the purpose of computing, there are provided one or more com uting heads 23, ofwhsich. two are shown in icated at 24 and'` 25, which, for the purpose: o' distinction, may betermed the upper and lower computin .heads While these computing heads'` are o any suitable character, they are shown` in; thiscasetobe of that type showninap-- v plicatiolr No, 543,603, in which; avmaster wheelr26i is givem a certain. rotation. at the striking o5 each. numeralf. key, thei extent Voi which depends upon theparticular numeral kep struck. This master wheelV is mounted onen arbor 27 which slidesL on] ai squa re shaft 28, soi as tol be connected thereto and# yet-l permitted! to; move longitudinally relativethereto.

The Shaft 28 is provided in the case of they upper adding head with a bevel pinion 29, andf thelower adding head with a bevel pinionf30;` The pinionsi29. and 30 meshfeach with@ pair of bevel pinions 31 and132 and" 33' and!l 34,. which it will be seen are arranged: to rotate thei inions 29 andi 30 in oppositeI directions, T e pinionsi 31, 32', 33 and 34 are loosely mounted on a shat 35? which is provided at one end=r with aylbevel gear 36 meshing with a,- corresponding ear 37 on a shaft 38. The-opposite endA of t e sha-ft' 38` is provided with a bevel gearV 39 which meshes with a bevel' gear 40lon ashaft 41'. The vgear 40, and. thus. the shaft 41, is adapted tobe rotated through the intermediary cfa bevel gear 42, ai sha-ft 43 andf bevel gears 44 and 45, by a motor shaft 46 driven by the motor 47.

The rotation of the shaft 41 however is prevented until one of the numeral keys is struck. f If reference is had. to Figures 1 and 11, it' will be seen that on each of the numeral keysl 2 there are. provided a air of jaws 48 -and 49, between which exten s a hook link 50 in such a manner'that it can be moved from between the jaws 48l and 49 by passing 'out through the opening at one sldethereof.

Each of the hook links 50 is connected at its opposite end to a bell crank lever 51, which is connected through the intermediary of a link 52 with a lever 53. The latter is provided with a jack 54 in each instance, which is located opposite one of a series of pins 55 provided' in a primary escapemcnt wheel 56. lWhen one of these pins is projected by one of the jacks 54, it will extend from the opposite side ofthe escapenient Wheel 56 so as to he stopped byr a lrotaryftoothed dog 57 mounted on ai shaft 58 which is also providedwith a secondary escapement wheel'l59, the teeth'of` which are adapted to be obstructed in their movement by a pair of dote-nts 60 and'61 provided one shaft`62. i* i This mechanism,'which is more fully described in Yapplication No. 543,603, acts S0, that when a numeral key is struck'one'of the' jacks will project the corresponding pin so l thatI when the detents 60` and 61A release the escapement wheel59',fthe'escapement wheel" 56 Vwill" be permittedf' to rotate a certain amount: dependent upon Ithe `particular nu merel key struck, becausez o'f'the?" variable distances "between the; severalfpins -55 fand' the rotary dog 57. J The escapeme'nt'i wheel 56,'". wl 1en thusjpe'rmittedto rotate,I rotatesl a'gear63'a correspending amount, throughL thejintermdiary 1 of' a 4shaft-64 to which-they laresecu'redrf' This ,gear 63 Vmeshesvv'ithia' correspondingy rear 65 on'the shaft.41.?;. E' -J- It -will thus be fseen, tas lfurther dsciibedf in application No. 543,603,5thattheshafta35r on'ivhich the gears '31 to34vare losely mounted is given a certain rotation dependent on the particular numeral key struck.

-Forthe purpose of'connecting the gears' 31- to' 34 to the shaft 35, so thatthey will be" driven by the latter. there' arer provided l' clutches 66 and 67 splined on the-shaft' 35v and adapted to be shifted intol engagement' with corresponding'. clutches onthe opposed faces of the ,qearsl31'to 34.V The clutch 66 may be shifted tromgone position fto another n by means of -a shifter lever 68 pivoted at 69,

'so that-therigears29andf30, and thus the master Wheels operated thereby, will. be-

driven in the opposite direction. When the shifter levers occupy an intermediate position, the clutches 66 and 67 will not be in connection with either of the members of each pair, so that the shaft-35 will not drive any of the gears 31 to 34. v

Of course itis to be understood that the shifter levers `68 and 70 can be operated independently so that the master wheels can b e rotated in the sanie direction, or in oppositedirectlonor one be rotatingr and the other remain passive. For the purpose ot llocking-the Ishifter levers 68 and 70 in each ofithe'ir positions of adjustment, there are provided, aswill be seen by reference to Figures 5. and-6, detent or'lock plates 72 and73, havingr 'ontheirexposed edges three serrated .f notches .74,1-into Whichlpins 75 on the shifter levers 68 and 70 can slip, soas to hold .thel

shifterflevers 'secure in any position of ad- Justment. Thedetenti` plates -72and L73 are providedl ieachvnvithV apinl =7 6 engagedfbya spring\77,wh1ch -urges each lof the'detentv plates forward toits lockingpositiom 26 'are :slidinglym'ounted A on "the shafts 28, thepurposefofinivhich is-to Vbrinar the teethl thereol su'cessiveiy intio engagement with"4 lnteralw teethV 'eiprovided :orb gears l79.

These gears179arerarranrzedIinaisei'ies side byu iside; fr andnare nprovided-with external teeth 180. t@ form external 'gearsIto'anesh with gears 71.. carrying'. snumeral or .computingr l wheels-82. This providesi forv the .individual rotation off-thesepara'teigearsl 79.1 andit is necessary to lcarry i the rotatior'i-'ofA one.` ,gear to the neitlad] acenten'eap Iwhen each :rear has made a complete rotation for the purpose of carryini'theinitsto tens and the tens 'to hundred and. so on. i .'Any- 'simple iuechanisni mav be'ilsedfor this purpose.:

In this: case, asishown in that illustrated infapplicaton4 No. 543,603, AeachLof the gears 79 is provided with-a special-tooth- S3 which is adapted: to iengagezonce in1-a complete rotation. a vetoothed.pinion=.84, which is provided' :with `az'gea 85'A `meshing with the teethoffthe next-highest gear :79.-V TheI pinion' 84 is iseparatedfrom the gear 85 'by anwinterr'nediate 86 to -which they areboth4 which a-'detentroller l87 is adapted to" act l secured, whicli is* provided with sockets to that wheny the wheel 86 begins to turn a. constantly rotating rubber roller 89 will. engage said teethand complete its turning, said roller 89 being driven by a gear 90 meshing with a. gear 91 on a shaft 92.

The shaft 92 is. provided with a gear 93 meshing with a gear 9-1 on a shaft 95,

the: latter having a bevel gear 96 on: one end, which, in the case ot eachadding head, is located opposite one oi the pairsi of bevel gears98, 99,. and 100, 191 loosely mounted on theshaft 91.. The shaft 9T' isgiven,- a constant rotation: when the computing mechanism is in.I operation. by a bevel gear 102 secured'. thereto, whicln mesheswith a bevel gear 103 on. a shaft 104i, the latter being provided also wtha beveL gear 105 meshing with a gear -106 onthe shaft 43, which, as has been previously described, is driven; by the motorl 4.7.

In the gears 98 to. 101` isalsoprovided a means. for shifting thev direction f rotation othe tensfcarryiing mechanism by changing the direction of rotation oiV the continuously rotating; rubber' rollers 89; For. connecting; thezpairs of gears 98' and 99, there isA provided;v a shiftableI clutch splined on theislaft', andjfor connecting` the. gears: 100 and 191` there is= provided; a 'shiftable clutch: 108 aclsos splined onf the= shaft 97. These clutches 107 and 108` are provided with. the usual: groove-109` intowhich! extend pins.110 onlevers 111 and 112, the former'- being pivotally mounted on a pin'l 11'13 secured( on the shifter lever.1 G8,

and.' the latter being pivotally mounted( on a pin 114; secured ori' the-'shifter lever To. Springs 116 urgetlie leversV 11'1, 112 to move with their 'shifter levers and: each of these shifter levers iszprovidedl with a boss lliwhixzh engagesc between fingers provided ons the levers-1:11'-andf-1'12'in such a, manner asfto permit o limited relative motion; on play, a'ndf yeti so' that they will cause theshifterlevers 68 and-70 to operate the leversvll'li andl112:if theparts are so jammed that the springsl 116 area too weak to release thel parts;

It will thusbe seen that. when either of the shifter levecsi 68 or 70 aremanipulated to change to any` of the three positions of adding, subtracting or neutral. that the driving mechanism for the tens= carrying mechanislnwill. bel simultaneously reversed or made stationary to` correspond to the direction of rotationofithe master wheels.

Eaclr of the: arbore 27 is provided with a movable frame` 117,. wherebv it may be- Fshifted through the series of gears 79 of,

each of the. computing heads24= and: 25 for the purpose of successively bringing the master Wheels in co-operationl with each of? the: gears 79- as the; carriage ismoved stepbystep ixrv the striking of successive. figures.

The frames 117 carrying the arborslwiitll the master wheels may beA manipulated from; the carriage in any. suitable manner, such as that. described in my application. No. 574,813, filed Laugust 1, 1910, (now Patent No. 1,244,398, dated October 23, 19.17)v wherein; a lever 118i is pivotally mountedl intermediate its ends at' 119 andis` adapted. to be intermittently connected through theilrtermediary of a catch 120 and the stops with the carriage 6. This lever 11S is provided at its opposite end with: forks121 and 122, whereby the frames 117 ot the computing heads 24 and may be moved by the lever 11S.

As has been stated above. if frequent changes from adding?y to subtracting are made, especially in a single line, it is desirable that the shifting mechanism shall be f -ontrollcd= automatically so as to relieve theoperator ot the work incident to the changing.- and also so as to eliminate danger of making mistakes. For this purposeA` the shifter 68 is provided with an extension arm 123, andthe shifter is provided with an extension arm 124, which arms are provided respectively with pins 125 and 126 adaptedto-connect the Shifters 68 and T0 with links 12T and 12S. The links 12T and 12S extend to the control mechanism to be described presently, but-connection ot these links with thepins 125 .and 126 is preferably such that the links canbe connected or disconnected at: theuv-lil of the operator. so as-to make the control operative or inoperative; For this. purpose, theends of the links -127 and 128, which` cooperate with the pins-125 and 126, are provided with connecting plates 129 in which are located somewhat triangular slots 130.

l'Phe-upper apex of each of thesetriangul'a'r slots: is provided with a-socket. 131, asseen more clearly by. reference tor Figure 12. It willi-be seen that when the pins 125 and 126 rest in these sockets 131 that the motion' of the extension links 12T andl1-28 will be transmitt'edI through the plates 129 to the extensions arms 123` and. 1124.

lt will befui'ther seen that when the elongated base portion of the slots 131 isulocated in register with the pins 125 andv 126` that (he links 12T and 12S will be free to oscillate without actuating tho extension arms 123y and 124. ln order to obtain the different positions o adjustment of the plates 129 andl the links connected thereto relativey to the pins. 125. andl 126, the plates 129 extendthrough suitable slots 132 is a sliding bracket 133. The sliding bracket is shown to be provided with slots 134 which are engaged.' by screw pins 135 so as to permit the sliding movement of the bracket 133 and vet confine its motion. The bracket133 may be manip ulated by a lever 136:l which is pivoted at 137, and isfprovided with sector' arm 138 on one side of this pivot 137 in which arm is located a slot 139 through Whichextends a pin 140 provided on the bracket 133. This gives a limited relative motion of the lever 136 with respect to the bracket 133, and yet permits the lever to! actuate the bracket so as to shift it to either of its adjusted positions. This mechanism may be termed a shifter for changing the position of the connecting linksV 127 and 128 so as to connect and disconnect them operatively to the shifter levers 68 and 70. A spring 141 is connected to the lever 136 tending normally to raise the sector end thereof to its highest position.

Inasmuch as the lowering of the bracket 133 connects the Shifters 68 and 7 0 to the control to be described, it is desirable that the locking plates 72 and 73 be operatively dis- 10 connected'from these Shifters 68 and 70, so

that they will not interfere with the action of the control. 'For this purpose` the other arm'of the lever 136 indicated at 142, extends between llugs 143and1144'ota slide 1'45, so

l5 4.that when the lever 1365sI actuated. this slide "145'N'vill' also be actuated. y

Atthe topand bottom of the slide 145 therei are provided'c'am `portions 146 fwhich i are adapted'to force the pins 76 backwardly llowers 154 and 155," so that these'yfollowers l'are oscillated- 4back and'fforth'y according to 'the camtracks 158fand159'. The movement `of the control 1.60 may be obtained from any lsuitable vmovable, portion' of the computing 'and typwriting"machinefa-rid inA this in- :so against the "tensionfbf the springs 77 so: as to remove the serratedfront portions of 'the detentplates 72" and from co-operation with'the pins 74 on theishifter levers i68 and .70.' Itwill'fbe' notedthat the cams 146y project a=suliicietdistance beyond the-rear edge of the slidin'gplate so esto lock the pins 76in Ithe position mdicated'lin Figure.-

Likewise, thefoot of each cam 465is cut af' y *leavin t 'adapted to be f sufficientv distance to forma socket, Tas lat 10'-'!147, so 'as' topermit the'pins 76 tobellocked i in the forward position of' the fdetent yplates :"72 and 73, asfindicated inlFigux-ef r1 l i l. Inasmuch as the slideplate 145. Vis thusY itself locked by the pins 7 6 in either position of adjustment, the lever 136 will be likewise lockedf' Of rcourse the lock is only'positive enough to prevent accidental disengagement.`

.and a forced disengagement of the lever 1 36 will readily disengage' the pins 76- from the MslideV plate 145.. LAny means may be'pro- Y vided'for permittingv the slidingvof the'plate" '145,'an'd in this instance, the plate isshown ftobe' guided in a groove 148, andto b e further 'confined and limited in its motionI by one 5 or more pin-and-slot connections 149.

'5 :Having thus described therncans for con! i necting the links to the shifting levers which `control the adding and subtracting, we now Jcome to-the'automatic control which operates the'links. As will be seen by reference to Figure 1, the 'linksr'127 and 128 are con nected -to bell crank levers 150 and 151 which are in turn connected by means of links 152'and 153 to followers 154 and 155, which are shownn the Vform of pivotally mounted bell crank levers having rollers 156 and 157 adapted to follow cam tracks 158 and 159 provided in a control 160,'which is slidingly mounted by means of channeled rollers 300 which engage a track plate 301 supported on any suitable fixed portion'of the frame of the machine.

It will be seen that eachof the cam tracks 158 and 159 has runs of three different eleva* tions connected by switch portions 161 to lchange from one elevation V,to the other. That Ation of thelshifter levers 68 and 70, thein- =termediatc elevation corresponds to the neutral position of the shift lever, and the upper elevation corresponds to the subtracting position of the shift lever. lnas- -rnuch as the extension arms 123 and 124 of 'the shifter levers `68 andi'O extend in opposite directions. the followers ,15,4 ,and 155 must also extend in oppositefdirections to obtain this agreement between the cam "tracks 158 and 4159,.

The control 160 moves relative toithe fol- Stance is shown as beingf'co'nfiected toA the "carriage 6.` For this'purpo the rack 16 is l'shown as;beingprpvided with a bracket 162 d a' slot'1'63', whereby it`forms a catch latch 164 issl'idin'gly mounted ori therco'ntrol A160 and movable by a. button`1'65',` so as vto connect or disconnect carriage at will.

While the cpntrol 160 :night-,be unchangeablewith' tl1e-`jditferent portions" of the cam tracks riiitegral with yeach lother so. that a separate controlwouldl h'avefto be used with athe control 160 to the each character ofwork, it is desirable that said controlv should be ofa composite nature and that the sections thereof should be interchangeable, so that any sequence of operations'1na`}T lie-obtained by the mere resetting of the control. For this purpose, the cam tracks 158 and 159 are composed of a series of individual sections 166 which are discon- -nectible from the body portion of the conlll) Jin 'which the addinehead -is neither adding nor subtracting. Auch a section `is indiicated at 168 in Figure 7.

Another type of .section is Where the cam track is located nearer the top than the bot-V tom of the sectioncorresponding tothe subtracting position of the follower .and the nuechanism'connected-.thereto Such a sec- .tion is indicated .at 169 .in Figure 7 The sections are preferably yso made that the sections 169 can be shifted from ,the up- ,per cam track 15,8 .to .the lower cam track 159, or sothat-theyvcan'be reversed'to form sec- .tixms'l-'J'Oiuwhich thecam track is located near the lower margin-of the section than the upper, corresponding to the adding posi- V-tion .of fthe follower and the mechanism connected thereto. i 1

' In order .to obtain this interchangeable und reversible vfeature of theA sections, the

fback end .of Leach .section .is ,rabbeted in a heveledmanner at theitop'and bottom edges,

.aseen more clearly by reference to Figures l and 8, -.so as toiorm dove-:tailed connec- .25 iticnm Vith ways lil-and 172,v une/oi which is rovided for-each ,of the cametracks desired.

Y heinnerfsdeof the ways 171 und 172 may be made stationary in .the form vof aiixed.

rail; wrhilethesothersides are shown to be 3D-movable lsoneto. form clamping rails 173 and 7&..'I`hese.clmping rails are .slidingly mounted omtheihgackY late 167 and connected in anyfsuite le rmannerhy one or 'nand-slct-.conneotions indicated `at A:i54 175. he `clamping- .rafils ligand 1,74 are 'held in their4 clamping position by springs Y 176 and 177 :whichareeonnected at one end tto the rails, :and anotherv ends to fthe hackplate f lixed chiock178l is located :nt onefend .of movement tof.the` sections' one.;direction, and .a movable chock 1.79is .prorided at Ithe opposite end of thecontrol .to prevent movetion. v i The chock 179 is preferably slidingly con. nected to theback plate 167..and normally :heldin its clamping position by means .of aspring 180. The limits otmovement of the.

.fand-slot connectienf-llso that W en the chock 179 engagesthe end' section 166, it will `benut of contact with .the'locking rails 173 and 174 as indicated in Figure 7 ,-so that the force o thespring 180 will be eii'ect-ive for thepurpose of Vsecuring the 'sections 166 in position; the,side.edgfes of the chock 179 being. rabbeted .at 182 to permit the chock 179 toengage the sections 166 without en- 00 gagingthe ends-of the rails 173 and 174. Y 'Ilhe rai-ls 4173 and 174, however, when themselves manipulated to' pass out of contact with the sect-ions 166, are adapted to simultaneous'ly force the Achock 179 out of en- 65, gngement with .the end vsections 166, .as will .-movable chock 179 are determined b a. pin-.

the @control 160 tto .prevent ment of the sections in the opposite direc-.

`intresse be seen hy-reference to Figure 10, where the rails and the chock 179 are shown in their expanded positions.

In vorder toobtain this manipulation of the rails 173 and 174 and the chock 179, there are provided actuators 183 and 181, shown in the form of -ca'm levers pivotally mounted on the back plate 167 and `adapted to lengage the ends of the rails 173 and 174. To release the sections, the cam levers are manipulated *from the position indicated in Figure 1 to the position indicated in Figure 10 whereby 'the rails are forced `from the position indicated in FigureJ. Vto the position indicated in F igure 1U against the tension of the springs Y 'tiene This projecting -lug 185 acts'as adam to manipulate throughvthe intermediary of a .roller 186 n bell crank lever 187 which is connected 'by .a link .188 'to an arm 189 on a. shaft 199'. The oppositeend of the shaft 190 extends to the front of the machine 'where it lis provided ywith an arm f191 whichv slidingly abuts against 'anal-m 192 one bell crank lever 193.' 'The other arm of this bell crank lever 193 is-provided Awith a slot. 194 in which engages a pin 195 secured Vto a shi-ft Vbar "196. This *shift Ahar 'is provided with a 4pluraliirv 'of slots 198-through which entendit-he hook links which connecteach of the numeral keys 2 with the escapernent mechanism',whereby theextent of movement `olifthe computing` mechanism -is determined.

It will thus-be seen that when the bell crank lever 187 is manipulated by the cam lug 185 provided fatthesend of lthe control i160, :that the shift bar 196 will !be Amanipulated -so ias -tc disconnect each of the hook links '50 trom the numeral keys Q, so-thet-the actuating-and controlling mechanism for the computing heads. will be rendered inactive. After the -control 160 .has beens'hifted to a position such astopermit ythe roller 186 toreturn'to 4its normal positionythe shi-ft bar 196-will be returned to a `positionconnecting the links 50 to the numeral keys Qby a spring 199 which returns the bell crank lever 193 to its normal position. Thus the spring 199 normally locks the keysto :the computing device, but .the bar 196 canbe moved to disconnect said keys from said device independently of the position of the control 160` It will be noted that from somepoints of view the control 160 may be regarded as a computing machine carriage.

Considering the operation of the device, .it will be 'seen' -thatsns each numeral .keyA is struck it will permit the rotation of each master wheel 26 an amount dependin on the particular numeral key struck, whic extent of rotation is determined by the particular pin 55 actuated by one of the jacks 54. This of course occurs only in the adding head which is either adding or subtracting, that is to say, in which the shifter levers 68 and 70 are thrown over toV their uppermost or lowermost position. If either of the shifter levers 68 and 70 is in an intermediate or neutral position, the corresponding computing head will not be actuated inasmuch as the master wheel will not be connected up in driving relation with the motor 47 and the control mechanism located intermediate the motor 47 and the shaft 35.

As each key is struck the carriage 6 will be fed stepby-step so that the number will be imprinted on the paper carried by the platen on the carriage.4 The carriage 6 will transmit this movement? step-by-step through the intermediary o f the stops 15,the latch 120 and the lever 118, to'each of the master wheels, so as tobring` it successively into co-operation' with each of the' If we assume that it is desired to repeat a definite sequence of operations which embody the shifting to adding, to subtracting and to neutral of the one or more adding heads, the control 160 may be set to relieve the operator of the manual manipulation of the shifter levers 68 and 70. The following example of a checking account-is given which is adapted to be carried on by the particular` control shown in the drawings.

We will assume that a man has a checking account and desires to keep track of his daily balances by merely striking them off on the typewritenhaving the computing mechanism governed by the control 160 automatically take care of the adding, subtracting and neutral states of the two computing heads, in order to add thexamount deposited to the balance of the day before, and add the several amounts checked' out, and concomitantly subtract the total amount checked out from the total of the balance of the day before, plus the amount de- -positedso as togive the balance to be carried forward to the next day. The 'example gears 89 whereby the several computing w eels 82 is as follows: may be actuated successively. -f s l i i 15:1 .Y

Balance car- Amount' Checked4 Checked Checked v- Total" 51 Y f Day' ried forward deposited. out. l., out. l out. i checked out. .yf Balance' June 1 8,074.11 'ii'j 545167.., 5, 678199 234i 56 123.45l faovroo "14,382.78 .lune 2...i.' 14, 382. 78 l5, 678. 92 -7, 654. 56 "i 123. 55 v 765:88' l '8, 543.99 11, 617. 71

I; 'FI l 1f-fi `1(:i"'g gr'\` i 1 al .wie f l wv if :sfuma .j It will be seen byV followingathe-l action 'the upper computing head will still remain of the cam control in the travelnoffthe' car-l in'addingwsectlons,A so' v that theY number riage in a letter feeding direction, that :the rollers .156 and 157 of thelcam followers 154 and 155 start in the 'sections 200 and 201 which are neutral sections,-so that theday June 1st, etc., can be written while both of the computing heads are#disconnectedl from the actuating mechanisin.It willfalso be noted that at thispoint thefcani.l lugs nected fromV the controlling mechanism forv the computingr mechanism by lthe'hooks 50 being disengaged from the jaws A18-"and 49.

For the iirst column of numerals designated as the Balance carriedforward column, the upper roller of the upper follower 154; will be depressed by a switch section 202 into an adding section 20'?!7 while v the roller of the follower 155 vcontrolling the lowencomputing head. will still remain in a neutral section, forming a continuation of the neutral section 201.

For the column designated as the Bal4 ance carried forward column, and. for the next column designated as the Amount deposited, the upp'erfollower 154 controlling:

11ower-computing"heady inactive. f i

In passing toY the' first Checked l out co1- umn, .ther carriage f automatically moves the control :160 :so thatr'thefollower" 154 controly 'lingethel upperr computing head-f passes 185 are in connection with the roller .186,-A so that all of the numeral keys 2 are disconthrough' fas switch- .sectionI 204 into a series ofgneutralseetions' 205. At-the- Same time, the'lower follo'wer 155 controlling thelower computing head passes throligsghY a" switch lsectiori206 into a series of adding'sect'ions '207.' so that at this point the upper computing head will be; rendered inactive while the lower computing head is starting to add. This continues until the series of col umns designated. as Cherked out have -been written. i 1:

i All this time Ithefamou'nts checked out have -been added' up.V in the' lower -computingi-head .6,037'.0 0..V Before this..is.written by the typewriter,'the upper follower 1.54 will have d "through ra switch section 208 and into substracting .fsections.209, so lthat the upper -computing 'head fWill be'shiffted from neutral to substracting. Atl vthe same time, the

lower follower `155 which controls the lower computing head will have -:passed through a switch sectionv 210 l-intosubtracti sections Qld; By #this action, 4when 16, 37.00 is struck by the typewriter, this amount will be subtracted in both the upper and lower 'computing' heads ithe difference in the upper -computxrgiiead between `the sum yof fthe balance -.rried "forward vand the vamount deposited for ireda 'andthe total 'amount checked out :for rthe ay, which may 'be termedxthedmlanceito he carried forward 'fortlrc 'next day, and'gat thev same 'time bringing .the 'lower 'computing head *back to l0 zero, b v subtracting the sum previously added therein. v

Der" the typewiiting of :the next columh-.rin eating :the :balance to be carried forward,rtheflowerollwerl, 'which con- 3 trois the floweroompnting' head, will pass through sa'iswtch Yil finlp movable sections 213 so that the lower computing head will:

remain passive or inactive. The upper follower 154 however will continue in subtract- 33 inor sections so 'that the balance 14,382.78

willbe subtracted softhat'the irppercom'-A puting head is tbrought hack to zero, but it any--mistake--is-made in copying the total from the computing head on the typewriter the computing head will not reacl'zero at the end of the operation. Thus the computing head will prove the accuracy of copying the result fiom zit.

nent dusja the awountanbecarried "'l -on-.tinfthesame waybyfrst writing the'day,V

'whilefthe computing mechanism 'sinactiva |then writing from the prerious'day'whileithe upper computinghead -is 'adding 'and the lower comput- 3 fing head is neutral',thexrwriting thee amountv deposited for'the day'whiiie the upper'computing head 'isaddng and the lower cour puting head *ismeutra-l, next writingth'e 'successi'we amounts checked -out whilethe upper m computing head is neutral and the "lower -computing'head is adding, then writing the total -nmountchecleedout While both of the computing heads are subtracting, and finally fw'rting -the balance for' the. day while the if" lower computing "hea'd is fneutna-l and the vupper computing head subtracting. It will thus b'eseenthat botlrof the computing heads start at zero, and afterhaivingcompleted the desired operations arefbrought im back to zero again vthrough the automatic action of they control.

ItI will be seen that inasmuch as the operation is entirely mechanical, there is no danger of the operator making any mistake ciA Except from 4strikingthe wrong key,` so that -suid computing the balance f fcariied forward great accuracy may be obtained with com- 'plicated calculation involving addition and subtraction.

It will be further seen that the operator is lrelieved from an unnecessary amount of work, and can devote all his attention to the striking of the proper numeral key in carryinvr out the work desired.

lVariations may be resorted to within the scope ofthe invention, and portions of the jmplrovements may be used without others.

:wing thus described my invention, l claim:

1. The combination with a plurality of stationary lcomputing heads manually setiablc yindividually for adding, subtracting and remaining passive or neutral, and autoimatic meansA for.' controlling concomitantly -all of said computing heads, so that some of heads may perform one -o eration while others of said computing heads remain neutral or vperform the opposite operation with the saine set of figures.

2. The combination with a typewriting mechanism including -a traveling carriage,

oa manually controlled computing mechianism l'mounted Vupon 'the stationary Atrainieworkof the machine, a control carriedby said carriage for determining the state of the computing mechanism as to adding, sub- 'traoting or remaining passive, and connections upon the framework' of the machine extending from said control to said computing mechanism.

3. The combination with a computing head of an automatic control for governing the change in action Vo'l said computingr head as to adding, subtracting and remaining lneu- 'trnlnnanuul means vfor governingr the change in action of and computing head as to add- Aing,'subtract/lngIr und remaining neutral and means for shifting the control from said'- manual means to said automatic control.

4. The combination `vith a stationary-computing head having a rotatable traveling master wheel for controlling-the operation fof the same1 of a tenscurrying mechanism for said computingY head and an automatic control operating to reverse said 'master wheel and said tens-carrying mechanism concomitantly.

5. The combination with a stationary couiputinghead having n-traveliug master wheel of a clutch controlling the rotation and direction of rotation of said master wheel. and an automatic cont-rol for shifting said clutch.

6. The combination with n typewrit'ing mechanism including .a carriage, of a com- .puting mechanism including a master wheel, a clutch controlling the rotation and direc tion of rotation oflsaid master wheel, and au automatic control carried by said carriage for shifting said clutch.

7. The combination with a computing head having a master Wheel, of a 'clutch i 12,'IThe combination with a controlling the rotation and direction of rotation of said master wheel, and an automatic control for shifting said clutch; said automatic control being adjustable to vary the sequence of movements of said clutch.

8. The combination with a computing head having a master Wheel, of a clutch controlling the rotation and direction of rotation of said master wheel, and an automatic control for shifting said clutch; said automatic control being of a composite nature and comprising a plurality of sections adjustable to vary the sequence of movements'pf said clutch.

9. The combination with a computing head having a master wheel, of a clutch controlling the rotation and direction of rotation of said master wheel, and an automatic control for shifting said clutch; said automatic control being of a composite nature and comprising a plurality of interchangeable sections capa le of varying the sequenceof movements of said clutch.

l10. The combination with a plurality of computing heads each having a master wheel of a clutch for each of said master wheels controlling the rotation and direction of rotation of saidmasterwheels, controlling mechanism and means for manipulating said clutches simultaneously and separately to corresponding or dierent positions. L

11. The combination with a plurality of computing heads each havin a master wheel, of'a` clutch for each of sai Tmaster wheels controlling the rotation and direction of-rotat-ion of said masterf wheels, controlling mechanism and means'for manipulating said clutches simultaneously 4and separately to rcorresponding or..ditl"erent itions; tens carryin -mechanismfor eac ofV saidcomputm'g eads, and.=clutches forfcontrolling the `=rotation-and direction of rotation of said tens carrying mechanism, said controlling mechanism havingimeans'for manipulating said last-mentioned clutches 4concomitantly with said first-mentioned clutches. plurality of computing heads,.of tens-carrying mechanism for each of said computing heads, clutches for controlling the rotation and direction: of rotation of said tens carrying mechanism, and controlling'mechanism having ,means for manipulating said clutches simultaneously and separately to corresponding or different positions.

13. The comb'nation with a. typewriting mechanism including I a letter-feeding carriage, of-computing mechanism comprising an element traveling with said carriage, carriagecontrolled means for governing the character of computation carried on by said computing mechan'sm, and means controlling the connection ofsaid governing 'means vvithsaid carriage to render the same operative crvinoperative.

14. The combination with a typewriting mechanism including a letter-feeding carriage, of computing mechanism comprising an element traveling with said carriage, carriage-controlled means for governing the character of computation carried on by said computing mechanism, and a latch forming a detachable means for connecting said first-mentioned means with said carriage so as to govern the control of said first mentioned means by said carriage.

15. The combination with typewriting mechanism, of computing mechanlsm, keys for controlling the operation of said typewriting mechanism and Said computing mechanism, a control for governing the character of computation by said computing mechanism, and means controlled by said control for determining the control of said computing mechanism by said keys.

16.- The combination with typewriting mechanism, of computing mechamsm, keys for controlling the operation of said typewriting mechanism and said computlng mechanism, a control for governing the active and inactive periods of said computin mechanism, and means'controlled by said control for determiningithe control of said computing mechanism by said keys.

17. The combination with typewriting mechanism, of computing.mechan1sm, keys for controlling the operation ofvsaid typewriting mechanism andv said cdmputing mechanism, a 'control for goverll'iingV the character of computation by said'computing mechanism, and disconnecting means controlled by said control for operatively disconnecting said computing.- mechanism from said keys so as to render saidcomputing mechanism'lina'ctive. 1 1:

18. Ihe A: combination Pwith typewrting mechanism, of computing mechanism, keys for controlling the ope-ration of sad typewriting' mechanism and said computing mechanism, a control for .governing the ;ac tive and inactive periods of said computing mechanism, and disconnecting -meansVcontrolled by said control fori operatively clisconnect'ng said computing mechanismjrom said keys so as to render' said computing mechanism inactive.

19. The combination with .typewriting mechanism, of computing mechanism, keys for controlling the operation of said typewriting mechanism and said computing mechanism, and a controlling means independent of actuation by said computing mechanism and said keys, for disconnecting said computing mechanism from said keys; said controlling means having certain parts adjustable to vary the instant of disconnec- Lion of said computing mechanism from said 20. The combination with typewiiting mechanism, 'of computing mechanism, keys of a computing. mechanism,

for controlling the operation of said typewriting mechanism and said computing mechanism, and a controlling means independent of actuation by said computing mechanism and said keys, for disconnecting said computing ymechanism from said keys; said contmlling Vmeans having certain parts interchangeable to varythe period of connection of said computing mechanism with said keys.

2l. The combination .with typewriting mechanism including-'numeral keys and also including-swimming carriage, "of a computing mechanism, including;V anindexing mechanism, keys oracontrolling said computingmechanism as well as said type- Writmg mechanism, anda control movable concomitantly with saidcarriage,wfor disconnecting said computing mechanism fromsaid'keys and thebypreventing the operation 4of said indexingmechanism by the numetal keys of the typewriter. A

22. AThe combination with typewriting mechanism including a traveling carriage,

keys for controllinor said computing mechanism as well as sai `typewrfrting mechanism, a' control lmovable concomitaxrtly with said-carriage for -ld-isconnectin 'fslid computing mechasaid keys, and means f orfpermitting .the movementbfisaid carnage while saidicoinzolzremansfstationary so as to render saidcontrol inactive. l .1.23. The s combination'. with .typewritingr mechanism, oiga piu e lity of keys for said typewriting mechanism, :a computing head, controlling means'fonsaid computing head, hook links detachablyconnectedito said keys andiconnected to said controlling means so that the operation offsaid'keysmay'control the operation' o .saidz'f'computing head through said-controllingmcans, .a -shift bar connected to said 4links for connecting and disconnecting? saidlinks with said keys,.a control z2 for determining- :the @character of computation of .said f computing head, and connections operable'by said control for actuating 'said'shift bar. v

24.4[1he combination with typewriting mechanism, oa plurality of keys lfor said typcwriting mechanism, a computing head, controlling means for said computing head, 'hook links detachably connected to said keys and connected to' said controlling means so that the `operation of said keys may control the operation of said computing head through said controlling means, a shift bar connected tofsald links for connecting and disconnecting said links with said keys, a control for determining the character of computation of said computing head, said control having one or more cam lugs thereon, a lever adapted to be operated by said cam lugs, and connections between said lever audV said shift banvhereby the actuation mechanism'including a carriage, o

of said lever willopcrate said shift bar to disconnect said keys from said computing mechanism.

Y 25. The' combination with typewritiug mechanism, of a plurality typewritings mechanism, a computing head, controlling meansfor said computing head, hook links detachably connected to said keys and connected to 'said controlling means so that the operation of said keysmay control the operation of said computing head through said controlling;` means, a shift bar Connected to said links for connecting and disconnecting said links with said keys, a control .for determining the character of computation of said computing head, said control having one or more cam lugs thereon` a lever adapted to be operated by said cam lugs, connections between said lever and said shift bar, whereby the actuation of said lever will operate said shift bar to discon- 'neet said keys from said computing mechanism, and spring means for returning said shift bar to connect saidcomputing mechansm with said keys. Y

26. The combination with typewriting mechanism including,r a carriage, of keys for "said, typewriting mechanlsm, a computing head comprising computing wheels, a source of power for turning said wheels, connections between said computing head and said keys whereby the action of -said computing head maybe controlled from said keys, and means "carried by said carriage for interrupting the'connection between said computing head and said keys.

27.7The. 'combinationY with typewriting mechanism includingfa carriapge` of keys for said typewritin,q K mechanism, a computing hea-d, connections hetween said computing head :and said keys whereby the action of said computing headV may be controlled'from said keys, means carried by said carriage-for interrupting 'the connection between said computing head and said keys, and spring means.V for completing the connection between said. computing head and said keys after interruption by said means carried by said carriage. 28. The combination with typewriting computing mechanism including a computing head, keys for controlling the action of both said computing mechanism and said typewriting mechanism, links detachably connected to said keys` a shift bar for shifting said links into and out of connection with said keys, mea-ns for connecting said links with 'said computing mechanism, a lever connected to said shift bar, a lever adapted to actuate said first-mentioned lever in one direction, a spring adapted to actuate said first-mentioned lever in another direction, a third lever connected to said second-mentioned lever, a roller on said first-mentioned lever,

of keys for said tracks L erein; said :sections abe' 'vary' the relative positions osaid tracks.- l '130. Thecombinationil with typewriting mechanism, of computing mechanismcperable rconcomitantly with said typewriting mechanism, and a control for governing the action of said computing mechanism,incli1d ing a plurality of sections:having tracks therein; said sectionsfbeing freversibleV to vary the relative positions of said tracks.

@31a The combination with typewriting mechanism, of computing fmechanismv operable 'concomitan'tly with @said typewriting mechanism, 'and a controlzforgovernng the 'action offsaid computingfmcchanism, includin Y a'cplu'ralityv fof 1- sections having i :interchangeable 'to .'vary: :the relative position of said'z tracks'and thus .to` .varyi the sequence of nactions ofisaid computinv'imechaiiism;

vw32. The combination z withf g typewriting mechanism, lof: :computing efrneclianisml 'operable concoinitantly with -isaid- :typewriting mechanism, a contfroljorL governing the actlon lofiI said computing zme'clianismf,l =includ ingia. back-il lategwsectionsfhavingftracks therein '.detac ablyionnected tois`aid back plate, andv means fo'rrr'clampingffsidi sections iu position-fon said'backz-platbaceinem 33'.'4 The .hcmbinatin vvith'mtypewriting mechanism, of computing mechanlsmnpenable^=conoomitalntly iwitlm saiditet 'writing mechanism; aA control for governing; the ac'- tion of said :computing 'mechansm, includ' ing a back .eplate sections 'having v:tracks therein fdctachably connected :tof-said'. back late, andfsprin actuated :clamping means or securing sai sectionsin'position on said back'plate :i "c er? 1; c ,\34.:The. combination with ftypewriting mechanism, of cmputing"mechamsm` oper- Yable 'concomitantly lwithy 'said' typewriting mechanism, a control for governing the action of said computing mechanism, includinga. back plate, a iixed rail onisaid back late, a movable rail on said back plate, said gxed and said movable'railsforming ways between them, and a plurality of interchangeable sections mountedvin saidways. 35. The combination with: typewriting mechanism, of computing mechanism operable concomitantly with said typewriting mechanism, a control for governing the action of said computing 1nechanism,pinc1uding a back plate, a fixed rail onsaid back plate, a movable rail on said back plate, said fixed and said-movable rails formin ways between them,A a. plurality of intero ange `able sections'mounted ini said ways, and meanscfor manipulating said movable rail.

36:The combination with typewriting mechanism, of computing mechanism operable concomitantly with said typewriting mechanism, a. control for governing theac- 'tion` of said computing mechanism, including a back plate, a Vfixed rail on said back plate, amovable rail on said back plate, said xedand said movable rails forming ways between them, a luralitv oi' interchangeable sectionsmounte in said'ways, a spring for actuating said movable rail to normally clamplsaid sections Vin position, and means for manipulating said movable rail 4against the tensionfof said spring. Y

T''lh'e combination with typewriting mechanisrmrof computing mechanism oper- Vableconc'omitantly with said typewriting `mechanism, acontrol for governing the ac- .tion-woivsaid computing mechanism, including a back plate, a fixed railon said back .plate,':a movable rail on said back plate, said :fixed and said movable rrails Vforming zivaysbetween them, a plurality of interchangeablesections mounted in-said ways, a'springforjactuating said movable/rail to `norinall ,y clainpr` said .sections inposition, means or manipulating'.'said movablez rail againstxthefitension of said spring-,zand `a movable chock for co-operating with said -rails'torhold said sectionsn position. -um'llre combination with] typewriting :"ifriechanism',` o'ffoolnputing mechanism operable 2 concmitantlyi' "with saidiaty'iewriting -mecha'nisrmf a; control i for Y governingv the `'actiblicofsaid i computing mechanism, lincludg'n'g'snback splate; a.- iixedi 'nail lr on said@ back plate, iamovnbletail oil-said =bacln plate, said .ffixedfandnsaid movable railsfoming ways between them ,pluralit o finterchangeable ,sections-matin in sai ways, aspring for faetuatingfsaidv movable rail ,to normally clampfzsaid secto'ns.- iniV `tion, means for manipulating said mov lemrailagainstthe tension of said* spring',Y and a ,chockV` co-operating "with-@said railsv to holdsad sections in,-position.:o; 4 n'= f 'Y '39."The combination '\vith' typewriting mechanism-, of :computing mechanism operable concomitantly with said f typewriting mechanism, a? control forgoverning the action ofz'said computing mechanism, including a back plate, interchangeable sections having' lcam tracks therein, fixed and movable rails for securing said Sections inposition, and fixed and movable chocksv co-operatingiwith said railsto secure said secti'onsin position.' l

40s-The combination with typewriting mechanism, of computing mechanism operable .Y 'goncomitantly with' said typeiv riting mechanism, a control for governing the action of said computing mechanism, including a back plate, interchangeable sections having cam tracks therein, fixed and movable rails for securing sai-d sections in position, [xed and movable chocks- (to-operating with said rails to secure said sections in position, and means for manipulating certain of said chocks andrails.

451. The combination with typewriting mechanism, of 4computing mechanism operable coneomtantiy with said t ewriting mechanism, a control for governing the action A'of said computing mechanism, including a 'back plate,` fixed and movable rails on said back plate, iixed and movable checks on said back plate, interchangeable sections secured between said rails andA said chocks, springs for moving certain-of said rails and said chocks in one direction to clamp said sections in position on said back plate, and means for moving certain of said rails and said chocks against the tension of said spring to permit the removal and adjustment of said sections.' l

42. The combination with 4a, computing head including-amaster wheel, of mechanism for determining-therotation of said master wheel, amanu'ally operable lever for controlling said mechanism, a link :for operating said leven'an4 automatic control Afor operating said link, and Imeans-for connecting and disconnecting said link with said lever. 1

43. The combination witlra computing head .including a master' wheel, of mechanism for determining the-rotation of said master wheelg a manually? operable lever for controlling/salviV medianism, a'link for operating said lever; anzautomatic control for operating said l.ink,lf'.inean'sv.for connecting and disconnecting-said linkt-with said, lever, a' lock for .locking said lever in .anyposition of adjustment thereof," and meansl operable by said last-mentioned means for removing said lock Vfrom co-operativc juxtaposition with said lever' whenY saidl link is Aconnected to said leven. f' j 44. The, combination with a computing head including'l-a master wheel, of mechanism for determining the rotation of said master wheel, a' shiftleverfor controlling said-mechanism, aA in on said lever, a. link having a slotted plate adapted to be connected to said lever through the intermediary'of said pin, the slot in said plate being of such a'character that in one position of said link said pin will connect said link with said lever, and in another position of said link said link will be free to move relative to said pin without operating said lever, shifting mechanism for varying the position of said link with respect to said pin, and means for manipulating said link.

45. The combination with a computing head including a master wheel, of mechanism for determining the rotation of said master wheel, a lever for controlling said mechanism, a pin on said lever, a link carrying a slotted plate engaging said in, the slot in said plate being of such a c aracter as to permit a relative motion of said link with respect to said lever in one, position of adjustment of said link, and to form a positive connection between said link and said lever at another position of adjustment of said link, a bar for manipulating said link to the several positions of adjustment, a le- Vver for actuating said bar, and means for operating said link to control the rotation of said master wheel.

45. The combination with a computing head including a master wheel, of mechanism for determining the rotation of said master wheel, a lever for controlling said mechanism, a pin on said lever, a link carrying a slotted -plate engaging said pin, the slotin said plate being of such a character as to permit a relative motion of said link with respect to said lever in one position of adjustment of said link, and to form a positive connection between said link and said lever at another position of adjustment of said link, a bar for manipulating said link to the several positions of adjustment, a lever for actuating said bar, means for operating said link to control the rotation of said master wheel, a lock-.plate for securing said first-mentioned lever in veral positions of adjustment and means operated by said second-mentioned lever for removing said lock plate from co-operation with said second mentioned lever when said link is operaivel-yfconnected with said first-mentioned eifel'. "."L

if," lfThe' 'combination with a .computing headincluding a master wheel, of mechanism ordetermining the rotation of said master wheel, a lever for controlling said mechanism, a pin on said lever, a, link carrying a slotted plate engaging said pin, the slot in said'plate being of such a character as to permit a relative motion of said link with 1 respect to said lever in one position ofzadjustment of said link, and to form a positive connection .between said link and said-lever at another position of adjustment of said link, a bar for manipulating said link to the several positions of adjustment, a lever for actuating said bar, means for operating said link to control lthe rotation of said master wheel, a lock plate for securing said first-mentioned lever in several positions of adjustment, and means operated by said second-mentioned lever for removing said lock plate from co-operation with said second mentioned lever whensaid link is operatively connected with said first-mentioaed. lever; said last-mentioned Ineens and said lock plate acting to 'lock said secondmentioned lever in either position of ad- ]ustment. v 4.

48. The combination with a plurality of computing heads each having a master wheel, of mechanism; lfor determiningi the rotation ofsaid master-wheels, atypewriting mecha msm .including mcarriage, (a, control, carned by said carriage having individual portions, forcontrolling said mechanism `so asA to determinethe rotation oteach o' said masterwheels, and connections betweensaid control andsaid mechanism.

.491 The combination 'with a plurality of computing heads, ofamaster wheel, for each of said computing heads, controlling mechafor each of said master .wheelss as to determine the -.rota tion ,thereo it-shifter lever for each.. of saidscontr'olling' mechanisms a link adapted to be operatively connected toeach of, said levers, shifting mechmism vforisim1.11taileoiisl .fconneetnsall 0f saidlinks l with allgof-said leyers,.and automatic means .for operating said links to def termine the rotationof said-,master-)vheels 50. The combination s. -wthf-.e wmputing head including a master. wheel, oi mechanism for determiningthe rotationbf. said master Whieel, a Alevelgfor. controlling said, mechanisinfa link connectible i tgnsiud lever so .as te i0 @rafa the .samei means-*for operativ said 'l andalevei-for shifting saidlin voulpfncQnQ-ggctn s srid first* mentioned lever, locking'gneans for said seeolidmentioiiddevssef;cie ,i ',1. In, a'combined type .jitingand com- Plitins Imchinethsi combinaties with', m1- .meralf kaysfandcatmlisgeersia .,.fof a master wheel -for eaeh'esi @assassine-0,11'- necting each. ,master, .yv o; enumeral keys to be turned tofan extent determined by the'numeral key operated, means .fon automatically determining, atvarious, ointsin the travel ofsaid carria ehow.ea,master wheel .shall-, be: A, ,tol said keys, and means for independently totally disconnecting said keys.from the computing mechamsm.A .J

52. In a combined typewritin'gand com putin machine, the combinationiwith `numeral keys and computing l. Whee'ls, of a traveling carriage, a master wheel for turning'said computing Wheels,` means for connecting said numeral keys to, said master wheel, aV connectionjrom said carriage for automatically disconnecting said keys from said wheel; said connection. being so arranged that said keys may be separately manually disconnected. .Y

53. In a combined typewriting and computing machine, the combination with numeral keys, ofv a plurality ofi stationary gangs of computing wheels, a traveling master wheel for each ang for turning the wheels to an extent eterniincd bythe nv.- meral key operated, a stationary source of power for so turning said Wheel, a clutch intermediate each master wheel and source of power, and means for automatically setting said clutches by the movement of the carriage. I

v54. In a combined typewriting and com` puting machine, thecombination with a slide, of a three-toothed detent plate swun to inoperative position by said slide, an a cam on said slide for detaining said slide in its shifted position.

55. In a combined typewriting and comA puting machine, the combination with numeral keys, a plurality of gangs of computi ing Wheels, of a master uizlieel for each of said gangs, a source of vpower-for turning said wheels by a single shaft, a clutch incally separately setting said clutches, and a single slide for disconnecting said automatic setting from said clutches.

56. In a combined typewriting and computing machine, the combination with a travelingcarriage, of computing whee1sa master wheel for turning said` computing wheels to an extent determined by said keys, means tending to couple, said keys to said master Wheel, and a control traveling vwith said carriage for positively breaking said connection. I, l 57. In a combined typewriting and cornputingmachine, the combination With numeral keys and computing Wheels, of a master wheel for. engaging said .wheels seriatim to turn-'them to an extent determined by the numeral keys, a clutch intermediate 4said keys and wheels for determininowhat effect said keys shall have on said wrheels, means for moving said clutch to a neutral position inl whichsaid keys will turn said master wheehand a separate means for totally disconnecting said keysfrom' said computing mechanism.

58. In a combined typewriting and computing machine, the combination witlrnumeral keys and computingwhcels, of means for `making said keys inoperative Qon said wheels, and another means for making said keys inoperative o n said computing mechanism.

59. In a computing machine, 4thecom bination with a traveling carriage, of mechanism, includino' a three-toothedV detent plate, for controlling said computing mechanism, said controlling mechanism also including means for moving said plate by travel of said carriage.

60. In a combined typewriting and coinico ios

puting machine, the combination with numeral keys and computing wheels` of a traveling carriage, a tabulating device for positioning said carriage, a rack forming part of said tabulating device, means con- `trolled by said carriage for varym l tabular keys, a rack, and means for causing said computing machine carriage to travel with said typewriter carriage.

62. In a combined typewriting and computing machine the combination with numeral keys and' a plurality of gangs of computing wheels, of a tabulating device comprising a rack bar for positioning said typewriterV carriage, a traveling device for automatically varying the connection botween said keys and each gang of computing wheels separately, 'and a latch to engage Saidv rack for' causing said traveling computngdevice to travel with said typewriter carriage.

63. In a combined typewriting and computing machine, the combination with a traveling carriage and a `plurality of gangs of computin W eels,of ainaster wheel for e'acl of 'Sai gangs, said gangs and said master Vwheels each forming relatively movable elements, a.A tabulatng mechanism for said typewriter, means" for connecting identical elements' to said carriage by a member of said'tabulating mechanism so that they move concomi-tantly, and independent mea-ns governed by the position of said carriage for determining how each master wheel shall be affected by the numeral keys. y

64. In a combined typewrting and computing machine, the combination with a traveling carriage, numeral keys and a gang of computing wheels, of means for connecting said computing mechanism to said carringe so that it automatically does cross` adding, andmeans settable for different columns. individully to be controlled by the travel of said carriage, for determining whether said computing wheels shall add, subtract or be neutral.

65. In a computing machine, a threetoothed detent plate whereby the computing mechanism is alined when manually operated, moved by the traveling carriage whereby when said computing mechanism is automatically controlled the detent plate is ineffective.

66. In a computing machine, two independent handles for controlling the connections to the totalizers, and a cam plate whereby a detent plate is caused to aline said handles when said handles are used to control the connections to the totalizers, and is moved to ineffective position when the connections are manually controlled.

67. The combination with a typewriting mechanism; or' computing mechanism operable concomitantly with said typewriting mechanism; a typewriter carriage; a bar moving therewith; and a control for said computing mechanism, said control including a plurality of cam sections mounted on said bar, and a follower cooperating with said cam sections.

68. The combination with a typewrifting mechanism; of computing mechanism operable concomitanti).v with said typewriting mechanism; a typewriter carriage; a. bar moving therewith; and a control for said computing mechanism, said control including a plurality of adjustable cam sections mounted on said bar and a follower cooperating with said adjustable cam sections.

(S9. In a calculating machine the combination of: a set 'of digit keys; a traveling carriage; a computing device; a master wheel yadapted to insert numbers seriatim in said computing device upon the operation of said digit keys; an escapement for said carriage also operated by said digit keys; a bar on said carriage; a plurality of cams adjustably mounted on said bar; a follower cooperating with said adjustable cams; and a gear shift device for said master wheel controlled by said follower whereby the action of said digit keys on said'masjter wheel during the travel of the carriage may be predetermined.

70. The combination with a plurality of totalizers, of a traveling carriage, individual statecontrolling mechanisms extending from said totalizens to said carriage and controlled from said carriage, and a master control dominating said individual control mechanisms.

7l. The combination with a computing head, of a controlling mechanism for governing the state of said computing head, a movably-mounfted plate, a series of locaitors detachably mounted on said plate in a straight line with each other, and an elongated guard-bar mounted on said plate and engaging said locators to hold them in position on said pla-te, said plate moving said locatore to bring them successively into cooperation with said controlling mechanism, to govern the state of said computing head.

72. The combination with a computing head, of a controlling mechanism for govel'nng thel state of said computing head, a shifter for manipulating said controlling mechanism, said shifter including a plurality of locatore, and a, pivobally-mound guard-bar for holding said locators in place.

73. The combination Wiith a computing head, of a shifter for controlling the State of said computing head, said shifter including a. series of locators arranged end to end in a straight line, and a spring-pressed 10 elongated guard for holding said looators in their position of alignment.

WALTER WRIGHT. Witnesses:

K. FRANKFORT, B. GowBERG. 

